I finally got a chance to view this, and it's really splendid push hands. I had seen footage of Dong Huling's form before, and marveled at the fluidity of his movement. That fluidity really carries over to his tuishou. His mastery of taiji skill is wonderful to watch. You can see him use zhou (elbow), cai (pluck), ji (press), etc., with complete spontaneity. Also note how he uses Cross Hands in various ways. Excellent!